JP2003011768A - Head part protection air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head part protection air bag device capable of quickly developing and inflating an air bag along a car interior wall composed of a windowpane and the like, even when a clearance between the car interior wall and an occupant is narrow. SOLUTION: This head part protection air bag device is provided with the air bag 11 accommodated in a folded state at an upper edge side of a window at a car interior side of a vehicle, and developed to cover the car interior side of the window when an inflation gas flows. An upper edge 12a side of the air bag 11 is formed as an upstream side part 17 of the inflating gas, and a lower edge 12b side is formed as a downstream side part 18 of the inflating gas, the lower edge 12b side is folded into two and located on the lower edge 12b side at a car exterior side of the upper edge 12a side from a condition of a car interior wall part 13a and a car exterior wall part 13b overlapped in flat, and then the lower end 33b side folded into two, is folded vertically zigzag to be close to an upper end 33a side, to be accommodated at the upper edge side of the window.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head provided with an airbag which is folded and accommodated on the upper edge side of a window on the inside of a vehicle and is expanded and inflated so as to cover the inside of the window when inflating gas flows in. Part protection airbag device.

[0002]

2. Description of the Related Art Conventionally, a head provided with an airbag which is folded and accommodated on the upper edge side of a window on the inside of a vehicle and expands and inflates so as to cover the inside of the window when inflating gas flows in. As a protective airbag device, Japanese Patent Application Laid-Open No.
There was one using the airbag disclosed in 0-335356.

In this head protection airbag device, the airbag is accordion-folded from the lower edge side toward the upper edge side,
It was stored at the upper edge of the window inside the vehicle.

In this type of head protection airbag device, in order to quickly deploy and inflate the airbag in a narrow gap between the vehicle interior wall made of window glass or the like and the occupant, the airbag is placed along the vehicle interior wall. It is desirable to deploy and inflate the airbag.

However, in the conventional bellows folding in which the lower edge side of the airbag approaches the upper edge side, when the gap between the vehicle inner wall and the occupant is narrow, the lower edge side of the airbag that expands and inflates is There is a possibility that the airbag may be interfered with by smooth deployment and inflation of the airbag by interfering with a belt anchor or the like arranged so as to project from the wall.

The present invention is to solve the above-mentioned problems, and even if the gap between the vehicle interior wall and the occupant is narrow, the airbag is quickly deployed along the vehicle interior wall made of window glass or the like. An object of the present invention is to provide a head protection airbag device that can be inflated.

[0007]

A head protection airbag device according to the present invention is folded and housed on the upper edge side of a window in the vehicle interior of a vehicle, and when the inflation gas flows in, the vehicle interior side wall portion and the vehicle exterior side. A head protection airbag device including an airbag that expands so as to cover a vehicle interior side of a window while inflating so as to separate from a wall portion, wherein the airbag has an upper edge side on an upstream side portion of inflation gas. The lower edge side is configured as a downstream side portion of the inflation gas, and the lower edge side is placed on the outer side of the upper edge side of the vehicle from a state in which the vehicle inner side wall portion and the vehicle outer side wall portion are overlapped and made flat. It is characterized in that it is folded in two and then folded in a vertical direction in a bellows manner so that the lower end side of the two folds approaches the upper end side, and is stored on the upper edge side of the window.

Further, the airbag is configured to have a portion for covering the inside of the pillar portion inside the vehicle, and the portion of the airbag for covering the inside portion of the pillar portion for the vehicle is such that the lower end side of the bellows fold after folding in half from the upper end side. It is preferable that the bellows is folded so as to be directed inward and then twisted after being folded into a bellows to be housed on the upper edge side of the window.

[0009]

According to the head protection airbag device of the present invention,
When the airbag receives the inflation gas and expands and inflates, the upstream portion of the airbag begins to expand due to the inflow of the inflation gas to the upstream portion, and the bellows fold is eliminated. At this time, the downstream side portion starts to eliminate the fold of the bellows fold as the upstream side portion folded and folded in two is unfolded, even if the expansion gas does not flow in. Then, when the inflation gas begins to flow from the upstream side portion to the downstream side portion, the upstream side portion expands so as to increase the thickness, and the downstream side portion also increases in thickness sequentially from the upper edge side to the lower edge side. By expanding, the part that expands so as to increase the thickness while pulling down the lower edge of the downstream side part propagates from the upstream side part to the lower edge side of the downstream side part.

That is, the bulging portion which inflates by inflating the inflation gas pulls the lower edge of the downstream side portion downward,
It moves from the upper edge side to the lower edge side of the downstream side portion. as a result,
Even if the gap between the vehicle interior wall composed of window glass and the like and the occupant is narrow, the bulging part that inflates by inflating the inflation gas intrudes into the narrow gap between the vehicle interior wall and the occupant from above, and , The lower edge of the downstream side portion is arranged in a narrow gap between the vehicle inner wall and the occupant so that the lower edge of the downstream side portion is inverted, and the expansion of the downstream side portion is smoothly completed together with the upstream side portion. .

Therefore, in the head protection airbag apparatus of the present invention, even if the gap between the vehicle interior wall and the occupant is narrow, the airbag is quickly expanded and inflated along the vehicle interior wall formed of window glass or the like. It is possible to

Incidentally, in Japanese Patent Laid-Open No. 2000-296753,
An airbag configured with the upper edge side as the upstream side portion of the inflation gas and the lower edge side as the downstream side portion of the inflation gas is folded in two so that the lower edge side is located inside the vehicle on the upper edge side, and folded in half. The lower end is folded up and stored so that the lower end approaches the upper end.

However, when the airbag is folded and stored as described above, the airbag allows the inflation gas to flow in to eliminate the fold of the bellows fold, and the inflation gas flows from the upstream portion to the downstream portion. When the occupant is approaching the inner wall of the vehicle, the lower edge of the downstream side portion located inside the vehicle is largely projected and inverted due to the expansion of the upstream side portion. The lower edge of the portion may interfere with the occupant, which is not preferable.

Further, according to the second aspect of the invention, the inflation gas is introduced into the portion of the airbag which is deployed so as to cover the inside of the pillar portion so as to eliminate the bellows folding. First of all, it will be developed into a substantially "V" shape with the outside of the vehicle open. Therefore, the airbag can be deployed without interfering with the pillar portion. Then, after that, the portion of the airbag which is deployed so as to cover the inside of the window disposed adjacent to the portion of the pillar portion that covers the inside of the vehicle, the lower edge of the downstream portion, as described above, the window. Since the vehicle enters the narrow gap between the vehicle inner wall made of glass etc. and the occupant from above, and is deployed so as to invert along the vehicle inner wall without being caught by the vehicle inner wall, The lower edge of the downstream portion of the airbag portion that expands so as to cover the inner side is also pulled by the lower edge of the downstream portion of the portion that expands so as to cover the vehicle inner side of the window, and extends along the vehicle inner side of the pillar portion. The lower edge of the downstream side portion smoothly enters into the narrow gap between the pillar portion and the headrest (or the backrest portion) of the seat, and the downstream side portion completes the expansion. As a result, even if the gap between the pillar portion and the headrest of the seat is narrow, the airbag can be reliably deployed and inflated between the pillar portion and the headrest of the seat.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a head protection airbag device (hereinafter abbreviated as "airbag device") M of the embodiment has an airbag 11 mounted between a center pillar portion CP inside the vehicle V. Window W (W1
W2) is folded and stored over the lower edge side of the front pillar portion FP and the lower edge side of the roof side rail portion RR in the upper edge side peripheral edge.

The airbag device M is composed of an airbag 1
1, inflator 44, mounting brackets 41 and 45,
Also, the airbag cover 8 is provided.

As shown in FIGS. 1 and 4, the inflator 44 is of a cylinder type for supplying the inflation gas G to the folded airbag 11. The inflator 44 has a connection port portion 14a, which will be described later, of the airbag 11 and an inner tube 31. Rear end 3
1a and 1 will be exteriorly packaged. The inflator 44 of the embodiment has a columnar main body portion 44a and an expansion gas G.
Guide tube portion 44 for guiding the inner tube 31 to the inner tube 31
c, and the guide tube portion 44c includes the main body portion 4
4a is caulked and fixed so as to partially reduce the inner diameter. The main body 44a has a plurality of gas discharge ports 44b for discharging the expansion gas G at its tip.

The mounting bracket 45 is made of sheet metal, and is a cylindrical holding portion 4 for holding the inflator 44 together with the connection port portion 14a and the inner tube rear end 31a from the outer peripheral side.
5a and an attachment portion 45b attached to the inner panel 2 made of sheet metal on the body 1 side on the vehicle interior side I of the roof side rail portion RR by using the two attachment bolts 46. The mounting bolt 46 is attached to the mounting portion 45b.
A mounting hole 45c is formed to insert the.

As shown in FIGS. 1 and 2, the mounting bracket 41 is made of sheet metal and holds each mounting portion 21 of the airbag 11 which will be described later. And an outer plate 41b. The inner and outer plates 41a and 41b have mounting holes 41 corresponding to the mounting holes 21a of the respective mounting portions 21.
c is penetrated. Then, the mounting bolts 40 are inserted into the mounting holes 21a and 41c and screwed into the nuts 2b fixed to the peripheral edge of the mounting holes 2a of the inner panel 2, whereby the mounting portions 21 are mounted to the inner panel 2. Becomes

As shown in FIGS. 1 to 3, the airbag cover 8 is provided from the lower edge side of each of the pillar garnish 4 arranged in the front pillar portion FP and the roof headlining 5 arranged in the roof side rail portion RR. It is configured. The front pillar garnish 4 and the roof head lining 5 are made of synthetic resin, and the inside I of the front pillar FP and the roof side rail RR is formed.
It is attached and fixed to the inner panel 2 of the body 1. Further, the roof head lining 5 is arranged from above the front pillar portion FP to above the center pillar portion CP to above the rear pillar portion (not shown).

The airbag 11 is shown in FIGS.
As shown in FIG. 3, the airbag main body 12 is provided with an inflating gas G that can be expanded and inflated, and an inner tube 31 that is disposed inside the airbag main body 12 and covers the inflator 44. There is.

The airbag body 12 is constructed by arranging front and rear mounting portions 26 and 27 on the front and rear sides, and except for the front and rear mounting portions 26 and 27, polyamide yarn and the like are used. It is manufactured by the used bag weave. In addition, as shown in FIGS. 1, 2, 3, 5 and 8, the airbag body 12 allows the inflation gas G from the inflator 44 to flow into the airbag body 12 and expands from the folded state to form the pillar garnish in the center pillar portion CP. The vehicle interior I of No. 7 and the vehicle interior I on the front side of the windows W1 and W2 with the center pillar portion CP interposed therebetween are deployed and inflated. In addition, the airbag body 12 has a vehicle interior side wall portion 13
a and the gas outer side wall portion 13b are separated from each other, the gas inflow portion 13 into which the inflation gas G can flow, and the inflation gas G.
And a non-inflow portion 20 that does not allow the inflow.

In the embodiment, the gas inflow portion 13 is composed of the gas supply passage portion 14 and the expansion shield portion 15.
The gas supply passage portion 14 has an upper edge 12a of the airbag body 12.
On the side, it is linearly arranged along the front-rear direction of the vehicle V. The inflation shield portion 15 is disposed below the gas supply passage portion 14, and is disposed laterally to the front seat of the vehicle V when the airbag 11 is deployed and inflated.
The vehicle is inflated to cover the window W1 on the side of the front seat and the window W2 on the side of the rear seat on the front side of the vehicle inside I with the center pillar portion CP interposed therebetween.

The gas supply passage portion 14 has a connection port portion 1 on the rear end side.
4a. The connection port portion 14a is formed in a substantially cylindrical shape so that the rear end is opened and the connection port portion 14a projects from the airbag body 12. The connection port portion 14a, as described above,
The inner tube rear end 31a is interposed between the inner tube and the inflator 44. And the connection port portion 14
The a and the inner tube rear end 31a are fixed to the inflator 44 by covering the clamp 47 as shown in FIG. Further, the gas supply passage portion 14 is formed wider than the connection port portion 14a so that the airbag cover 8 can be easily pushed open when the inflation gas G is introduced.

The expansion shield portion 15 is a partition joint portion 2 which will be described later.
It is configured to include a plurality of (five in the embodiment) inflating portions 16 that are partitioned in four and extend in the up-down direction along the front-rear direction of the vehicle. The inflatable portion 16 includes a window-side inflatable portion 16A, 16B, 16C, and 16E that covers the vehicle interior I on the front side of the window W1 and the window W2 and a pillar-side inflatable portion that covers the vehicle interior I of the center pillar garnish 7 at the time of deployment and inflation. 16D. Then, the expansion shield portion 15 has the upper edge side as the upstream side portion 17 of the expansion gas G,
The lower edge side is configured as the downstream side portion 18 of the inflation gas G.

Expansion parts 16A, 16B, 16C, 16D
The upper ends of 16E are respectively connected to the gas supply passage portion 14, and the expansion portions 16A, 16B, 16C and 16D are also connected.
-The lower ends of 16E are configured to communicate with each other.

The non-inflow portion 21 is a mounting portion 2 constructed so as to connect the vehicle interior side wall portion 13a and the vehicle exterior side wall portion 13b.
1, the peripheral edge joint portion 22, the partition joint portion 24, and the front / rear side attachment portions 26 which are disposed on the front end side and the rear end side of the inflation shield portion 15 and are formed separately from the airbag body 12. 27
It consists of and.

The peripheral connecting portion 22 is arranged around the gas inflow portion 13 at a portion in contact with the gas inflow portion 13 and is tightly woven so that gas leakage does not occur.

The mounting portion 21 includes an upper edge side portion 22a of the peripheral edge coupling portion 22 on the upper edge 12a side of the airbag body 12, and
Plural (seven in the embodiment) are arranged so that the mounting brackets 41 for mounting to the inner panel 2 are fixed so as to project upward from the front / rear mounting portions 26, 27. Each mounting portion 21 has a mounting hole 21a through which the mounting bolt 40 is inserted.

The front side / rear side attaching portions 26 and 27 are arranged on the front end side and the rear end side of the expansion shield portion 15, respectively, and in the embodiment, the polyamide yarn is provided separately from the airbag body 12. It is formed of a woven fabric using a polyester thread or the like, and is sewn to the front edge side and the rear edge side of the peripheral edge joint portion 22. The front attachment portion 26 includes a substantially trapezoidal main body portion 26a, and a belt portion 26 that protrudes forward from the front end side of the main body portion 26a.
b, and is comprised. Also, the belt portion 26b
An attachment portion 21F is arranged at the front end of the. And
The front attachment portion 26 has a rear end of the main body portion 26a sewn to the front edge side of the peripheral edge coupling portion 22 with a suture thread T. The rear mounting portion 27 includes a body portion 27a having a substantially triangular shape and a body portion 2
A belt portion 27b protruding upward from the rear end side of 7a,
It is configured with. The mounting portion 21B is arranged at the rear end of the belt portion 27b. Rear mounting part 2
7, the front end of the main body portion 27a is sewn to the rear edge side of the peripheral joining portion 22 with a suture thread T.

In the embodiment, the front / rear mounting portions 26.2
7 is formed of a woven fabric that is separate from the airbag body 12, but the front / rear mounting portions 26 and 27 are different from the non-inflow portion 20.
Similar to the above-mentioned part, it may be integrally formed with the airbag body 12 by bag-weaving. However, the front and rear mounting parts 26.2
If 7 is formed of a separate woven fabric, the front and rear mounting parts 26,
The thickness of the portion 27 can be reduced, and the airbag 11 can be made compact when folded.
Further, in the embodiment, as shown in FIG. 5, the front side / rear side mounting portions 26/27 are arranged so that the warp yarns VT or the weft yarns HT constituting the woven fabric are substantially parallel to the respective belt portions 26b / 27b. Is formed. Warp VT that constitutes woven cloth
Alternatively, if the front and rear mounting portions 26 and 27 are formed so that the weft HT is substantially parallel to the belt portions 26b and 27b, when the airbag 11 is deployed and inflated, the belt portion 26 is formed.
Tension is generated in b and 27b, and the airbag body 12
This is because even if the pressure is applied to the vehicle interior I or the vehicle exterior O, it does not swing significantly and is preferable.

The partition connecting portion 24 is provided in the area of the expansion shield portion 15 with the expansion portions 16A, 16B, 16C, 16D and 16 respectively.
A plurality of vehicles are arranged side by side in the front-rear direction of the vehicle V so as to partition E.

The inner tube 31 has a cylindrical shape and is inserted into the gas supply passage portion 14 of the airbag body 12,
It is arranged from the connection port portion 14a to near the upper part of the window side inflating portion 16E. Rear end 31a of the inner tube 31
Is heat-welded to the inner peripheral side of the connection port portion 14a so as not to be displaced when it is exteriorly mounted on the inflator 44. The inner tube 31 is arranged to prevent the high-temperature expansion gas G discharged from the inflator 44 from directly hitting the gas supply passage portion 14 and damaging the gas supply passage portion 14. One end of a sheet material made of a woven fabric using threads, polyester threads or the like is sewn together with a suture thread T made of polyamide thread or the like to form a cylindrical shape.

Next, the mounting of the airbag apparatus M on the vehicle V will be described. First, the inner tube 31
Insert into the airbag body 12. Inner tube 31
From the opening side of the connection port portion 14a into the gas supply passage portion 14 of the airbag body 12 to which the front / rear mounting portions 26/27 are sewn, using a predetermined jig, and End 31a
The side is heat-welded to the vicinity of the connection port 14a by using high-frequency welding or the like to manufacture the airbag 11. Next, the airbag main body 12 in which the vehicle interior side wall portion 13a and the vehicle exterior side wall portion 13b are superposed and flatly developed is first shown in FIG. 5 by a two-dot chain line, with the lower edge 12b side being the outer side of the upper edge 12a side. Fold it in half at crease C1 so that it is placed in O. Then, as shown by the chain double-dashed line in FIG. 9, the folded airbag 33 is sequentially folded into a fold C2 of a mountain fold and a valley fold.
Lower end 33b of the airbag 33 folded in half
The bellows is folded in the up-down direction so that the side approaches the upper end 33a side (see FIGS. 2 and 3).

The air bag 35 having the bellows folded.
Wrap a rupturable tape 40 to prevent collapse and wrap the airbag 35 at a predetermined position, and attach an inflator 44 and mounting brackets 41 and 45 to the airbag assembly as shown in FIG. 38 is formed. Then, when the tape 40 is wound, the portion of the pillar-side inflatable portion 16D is mounted on the vehicle V so that the lower end 35b side faces the vehicle inner side I from the upper end 35a side.
The twisted portion 39 is formed by twisting the portion of the pillar-side expanded portion 16D (see FIG. 3).

After that, the mounting brackets 41 and 45 are arranged at predetermined positions on the inner panel 2, and the mounting holes 21a and
41c and 45c are inserted and bolts 42 and 46 are stopped,
The mounting brackets 41 and 45 are fixed to the inner panel 21, and the airbag assembly 38 is attached to the body 1.
Next, a lead wire (not shown) extending from a predetermined inflator actuation control device is connected to the inflator 44, the front pillar garnish 4 and the roof head lining 5 are attached to the body 1, and further the center pillar garnish 7 is attached to the body 1. In this case, the airbag device M will be mounted on the vehicle V.

At this time, as shown in FIG. 3, the portion of the pillar-side inflating portion 16D is housed in a twisted state so that the lower end 35b side faces the vehicle inner side I from the upper end 35a side. In FIG. 3, reference numeral 44 is a sheet metal regulating member having a substantially L-shaped cross section, which is fixed to the inner panel 2. The restriction member 44 is arranged to prevent the airbag 11 from entering the vehicle outer side O of the center pillar garnish 7 when the airbag 11 is deployed and inflated.

If the inflator 44 is actuated after the airbag device M is mounted on the vehicle V, the inflator 44 is activated.
As shown by the chain double-dashed line in FIG.
The gas flows through the inner tube 31 to the front side in the gas supply passage portion 14. The expansion gas G is supplied to the gas supply passage 1
4, the expansion shield 15 begins to expand while canceling the folding. And the airbag body 12
1 ruptures the wrapped tape 40, and further pushes open the airbag cover 8 on the lower edge side of the front pillar garnish 4 and the roof head lining 5 to open them.
As indicated by the chain double-dashed line of 3, the center pillar garnish 7 in the center pillar portion CP is projected downward.
Window W1 between the inside I of the car and the center pillar CP
And, it will be greatly expanded so as to cover the front side of the window W2.

In the airbag apparatus M of the embodiment, when the airbag 11 is caused to flow the inflation gas G and is inflated and inflated, the window side inflating portion 16A of the airbag 11 is inflated.
・ For 16B, 16C, and 16E, first, the gas supply passage 1
4, the expansion gas G flows into the upstream side portion 17 of the expansion shield portion 15, and the upstream side portion 17 begins to expand,
Eliminate the bellows fold. At this time, the expansion parts 16A and 16
The downstream side portion 18 of B, 16C, 16E is the expansion gas G
11A, as shown in FIG. 11A, the folds of the bellows fold will start to be eliminated as the upstream side portion 17 folded and folded in two is unfolded. The expansion gas G flows from the upstream side portion 17 to the downstream side portion 18
If it begins to flow in, the upstream side portion 17 expands so as to increase its thickness, and the downstream side portion 18 also expands so as to sequentially increase in thickness from the upper edge 18a side to the lower edge 18b side. While lowering the lower edge 18b of the downstream portion 18, the portion that expands to increase the thickness propagates from the upstream portion 17 to the lower edge 18b of the downstream portion 18.

That is, as shown in FIG. 11B, the bulging portion 51, which is inflated by inflowing the inflation gas G, pulls the lower edge 18b of the downstream side portion 18 downward, and successively the downstream side portion 1
8 moves from the upper edge 18a side to the lower edge 18b side. As a result, even if the gap between the vehicle interior wall IW composed of the window glass W1 and W2 and the occupant is narrow, the bulging portion 51 that inflates by inflating the inflation gas G is provided between the vehicle interior wall IW and the occupant. Of the lower part 18 of the downstream part 18
As shown in FIG. 11B, b is disposed in a narrow gap between the vehicle inner wall IW and the occupant so as to be inverted along the vehicle inner wall IW, and the expansion of the upstream portion 17 and the downstream portion 18 is completed smoothly. Will be made.

Therefore, in the airbag apparatus M of the embodiment, the airbag 11 is arranged along the vehicle interior wall IW composed of the window glasses W1 and W2, etc. even if the gap between the vehicle interior wall IW and the occupant is narrow. It is possible to rapidly deploy and inflate.

Further, at the portion of the pillar portion side inflating portion 16D in the airbag 11, the pillar portion side inflating portion 16D is
As shown in FIG. 12A, the inflation gas G is allowed to flow in, and the bellows fold is eliminated, and first, the vehicle outer side O is expanded into a substantially “doglegged” shape. Therefore, the airbag 11 can be deployed without interfering with the center pillar portion CP. At this time, the downstream side portion 18 of the pillar portion side inflating portion 16D has the window side inflating portion 16A.
Similar to 6B, 16C, and 16E, the bellows fold is eliminated in a state in which the inflation gas G does not flow. And then
The window-side inflatable portions 16A, 16B, 16C, and 16E arranged before and after the pillar-side inflatable portion 16D have the lower edge 18b of the downstream portion 18 and the vehicle inner wall IW composed of window glass W1 and W2 and the occupant. Between the pillar portion side inflatable portion 16D and the downstream side portion 18 of the pillar portion side inflating portion 16D, since the narrow gap between the pillar portion side inflating portion 16D is unfolded along the vehicle inner wall IW without being caught by the vehicle inner wall IW. The edge 18c is also pulled by the lower edge 18b of the downstream side portion 18 of the window-side inflatable portion 16A, 16B, 16C, 16E, and expands so as to invert along the vehicle interior I of the center pillar garnish 7 (vehicle interior wall IW). , The lower edge 18c of the downstream portion 18 is
It smoothly enters into the narrow gap between the center pillar garnish 7 and the headrest HR (or the backrest portion SB) of the seat S, and the downstream side portion 18 completes the expansion. As a result, even if the clearance between the center pillar garnish 7 and the headrest HR of the seat S is narrow, the center pillar garnish 7 and the headrest HR of the seat S are reduced.
In between, the airbag 11 can be surely deployed and inflated.

In the embodiment, in the airbag 11, only the portion of the pillar-side inflating portion 16D that covers the vehicle interior I of the center pillar portion CP is twisted and stored.
For example, the pillar-side inflatable portion 16D and the window-side inflatable portion 16E that cover the inside I of the center pillar portion CP and the window W2 may be twisted and housed.

Further, in the embodiment, the airbag 11 is disclosed to cover from the window W1 to the front side of the window W2, but the airbag applicable to the airbag apparatus M of the present invention is this. Window W
You may use the airbag of the structure which covers 1 * W2 over substantially the whole surface.

Further, the airbag device of the embodiment is mounted on a vehicle in which the center pillar portion is arranged between the front pillar portion and the rear pillar portion. The present invention is not limited to this, and can be applied to, for example, a vehicle including a plurality of intermediate pillar portions between the front pillar portion and the rear pillar portion.

[Brief description of drawings]

FIG. 1 is a schematic front view showing a usage mode of a head protection airbag device according to an embodiment of the present invention, as viewed from the inside of a vehicle.

FIG. 2 is a schematic enlarged cross-sectional view of a II-II portion of FIG.

FIG. 3 is a schematic enlarged cross-sectional view of a III-III portion of FIG.

FIG. 4 is a partial cross-sectional view of a portion where the inflator of the same embodiment is provided.

FIG. 5 is a front view showing a state in which the airbag used in the same embodiment is flatly deployed.

FIG. 6 is a partially enlarged transverse sectional view showing the airbag of the same embodiment when inflated, showing a state in which the VI-VI portion of FIG. 5 is inflated.

FIG. 7 is a partially enlarged vertical sectional view showing the airbag of the same embodiment when inflated, showing a state in which the VII-VII portion of FIG. 5 is inflated.

FIG. 8 is a partially enlarged vertical sectional view showing the airbag of the same embodiment when inflated, showing a state where the VIII-VIII portion of FIG. 5 is inflated.

FIG. 9 is a front view showing a folded state of the airbag of the same embodiment.

FIG. 10 is a front view showing the airbag assembly of the embodiment.

FIG. 11 is a schematic cross-sectional view showing a deployed state of the window-side inflatable section in the head protection airbag apparatus of the same embodiment.

FIG. 12 is a schematic cross-sectional view showing a deployed state of the pillar-side inflatable portion in the head protection airbag apparatus of the same embodiment.

FIG. 13 is a schematic cross-sectional view showing a deployed state of the pillar-side inflatable portion in the head protection airbag apparatus of the embodiment, which is a schematic cross-sectional view showing a state after FIG.

[Explanation of symbols]

11 ... airbags, 13 ... Gas inlet, 13a ... Side wall of the vehicle, 13b ... the outer wall of the vehicle, 15 ... expansion shield, 16 ... expansion part, 16A, 16B, 16C, 16E ... Window-side inflatable section, 17 ... upstream part (of the expansion shield), 18 ... Downstream part (of the expansion shield), 18a ... the upper edge (of the downstream side portion), 18b, 18c ... Lower edge (of the downstream side portion), 16D: Pillar part side expansion part, 20 ... Non-inflow part, 25 ... Compartment joint, 33 ... an airbag folded in two, 33a ... the upper end (of the folded airbag), 33b ... the lower end (of the folded airbag), 35 ... An air bag folded into a bellows, 35a ... the upper end (of an airbag folded into a bellows), 35b ... the lower end (of an airbag folded in a bellows), 38 ... Airbag assembly, 39 ... twisted part, 44 ... Inflator, CP ... Center pillar section, S ... sheet, W (W1, W2) ... window, IW ... car interior wall, M: Head protection airbag device.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yasuo Ochiai             Aichi Prefecture Kasuga-cho, Nishikasugai-gun Ochiai character Nagahata 1             Address within Toyoda Gosei Co., Ltd. (72) Inventor Masamitsu Saito             1 Toyota Town, Toyota City, Aichi Prefecture Toyota Auto             Car Co., Ltd. (72) Inventor Black ▲ Yanagi ▼ Teruji             Toyo, 100 Kanayama, Ichiriyama-cho, Kariya city, Aichi prefecture             Inside Tatai Co., Ltd. F-term (reference) 3D054 AA02 AA03 AA04 AA07 AA18                       CC04 CC11 CC26 CC27 CC29                       CC30

Claims (2)

[Claims] 1. A vehicle inner side of the window, which is folded and accommodated on the upper edge side of the window on the vehicle inner side of the vehicle and expands so as to separate the vehicle inner side wall portion and the vehicle outer side wall portion when the inflation gas flows in. A head protection airbag device having an airbag that is deployed so as to cover the airbag, wherein the airbag has an upper edge side as an upstream side portion of the inflation gas and a lower edge side as a downstream side portion of the inflation gas. Also, from the state in which the vehicle interior side wall portion and the vehicle exterior side wall portion are overlapped and made flat, the lower edge side is folded in two so as to be located on the vehicle outer side of the upper edge side, and then the folded lower end side is the upper end. A head protection airbag device, characterized in that it is folded up and down in a vertical direction so as to be closer to the side, and is housed on the upper edge side of the window. 2. The airbag is configured to include a portion that covers a vehicle inner side of a pillar portion, and a portion of the airbag that covers a vehicle inner side of the pillar portion has an upper end on a lower end side of a bellows fold after being folded in half. The head protection airbag apparatus according to claim 1, wherein the head protection airbag apparatus is housed on the upper edge side of the window by being twisted after the bellows folding so as to face the inside of the vehicle from the side.